python datetime获取几分钟、小时、天之前的时间

import datetime

print ((datetime.datetime.now()-datetime.timedelta(days=1)).strftime("%Y-%m-%d %H:%M"))

print ((datetime.datetime.now()-datetime.timedelta(minutes=1)).strftime("%Y-%m-%d %H:%M"))

print ((datetime.datetime.now()-datetime.timedelta(seconds=1)).strftime("%Y-%m-%d %H:%M"))

　　输出结果

以下是随机获取15天前的日期和时间实例：

import datetime

import random

d = random.randint(0,15)

date = ((datetime.datetime.now()-datetime.timedelta(days=d)).strftime("%Y-%m-%d %H:%M:%S"))

# print date

day = date[0:11]

# print "day:", day

h = random.randint(0,24)

date = ((datetime.datetime.now()-datetime.timedelta(hours=h)).strftime("%Y-%m-%d %H:%M:%S"))

# print date

hour = date[11:13]

# print "hour: ",hour

m = random.randint(0,15)

date = ((datetime.datetime.now()-datetime.timedelta(minutes=m)).strftime("%Y-%m-%d %H:%M:%S"))

# print date

minue = date[14:16]

# print "minue: ", minue

s = random.randint(0,24)

date = ((datetime.datetime.now()-datetime.timedelta(seconds=s)).strftime("%Y-%m-%d %H:%M:%S"))

# print date

second = date[17:19]

# print "second: ", second

new_time = hour+":"+minue+":"+second

print day,new_time

　输出结果：

实例：

#coding:UTF-8

import time

import datetime

import random

def get_time():

    d = random.randint(0,15)

    date = ((datetime.datetime.now()-datetime.timedelta(days=d)).strftime("%Y-%m-%d %H:%M:%S"))

    # print date

    day = date[0:11]

    # print "day:", day

    h = random.randint(0,24)

    date = ((datetime.datetime.now()-datetime.timedelta(hours=h)).strftime("%Y-%m-%d %H:%M:%S"))

    # print date

    hour = date[11:13]

    # print "hour: ",hour

    m = random.randint(0,15)

    date = ((datetime.datetime.now()-datetime.timedelta(minutes=m)).strftime("%Y-%m-%d %H:%M:%S"))

    # print date

    minue = date[14:16]

    # print "minue: ", minue

    s = random.randint(0,24)

    date = ((datetime.datetime.now()-datetime.timedelta(seconds=s)).strftime("%Y-%m-%d %H:%M:%S"))

    # print date

    second = date[17:19]

    # print "second: ", second

    new_time = hour+":"+minue+":"+second

    return day.strip(),new_time.strip()

day,times=get_time()

print day

print times

str_1 = '{"PN":"34VT123","DUID":"XXXX","location":{"coordinates":[-100.35256443,33.4586858]},"SPD":125,"DT":"'

str_2 = 'Z","driverID":"XXXXX","cate":"event","subCate":"OBDII","eventOBDII":{"what":"emergencyBrake","param":2,"GID":123456479}}'

des_str = '2017-06-02T13:15:20'

str_des = str_1 + day + 'T' + times + str_2

print str_des

　输出

> "D:\Python27\python.exe"  "F:\MQTT_testing\data.py"

2017-05-26

02:21:19

{"PN":"34VT123","DUID":"XXXX","location":{"coordinates":[-100.35256443,33.4586858]},"SPD":125,"DT":"2017-05-26T02:21:19Z","driverID":"XXXXX","cate":"event","subCate":"OBDII","eventOBDII":{"what":"emergencyBrake","param":2,"GID":123456479}}

巴特西

python datetime获取几分钟、小时、天之前的时间

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